1.8 nV/√Hz, 36 V Precision Amplifiers
ADA4004-1/ADA4004-2/ADA4004-4
FEATURES
PIN CONFIGURATIONS
Very low voltage noise: 1.8 nV/√Hz
Low input bias current: 90 nA maximum
Offset voltage: 125 μV maximum
High gain: 120 dB
OUT
V–
1
2
3
5
V+
ADA4004-1
TOP VIEW
(Not to Scale)
+IN
3
–IN
Wide bandwidth: 12 MHz
Figure 1. 5-Lead SOT
(RJ-5)
±5 V to ±15 V operation
APPLICATIONS
NC
–IN
+IN
V–
1
8
7
6
5
NC
Precision instrumentation
Filter blocks
Microphone preamplifiers
Industrial control
ADA4004-1
2
3
4
V+
OUT
NC
TOP VIEW
(Not to Scale)
NC = NO CONNECT
Thermocouples and RTDs
Reference buffers
Figure 2. 8-Lead SOIC
(R-8)
GENERAL DESCRIPTION
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
ADA4004-2
TOP VIEW
(Not to Scale)
OUT B
–IN B
+IN B
The ADA4004-1/ADA4004-2/ADA4004-4 are 1.8 nV/√Hz
precision amplifiers featuring 40 μV offset, 0.7 μV/°C drift, 12
MHz bandwidth, and low 1.7 mA per amplifier supply current.
NC = NO CONNECT
Figure 3. 8-Lead MSOP (RM-8) and 8-Lead SOIC (R-8)
The ADA4004-1/ADA4004-2/ADA4004-4 are designed on the
high performance iPolar™ process, enabling improvements such
as reduced noise and power consumption, increased speed and
stability, and smaller footprint size. Novel design techniques enable
the ADA4004-1/ADA4004-2/ADA4004-4 to achieve 1.8 nV/√Hz
voltage noise density and a low 6 Hz 1/f noise corner frequency
while consuming just 1.7 mA per amplifier. The small package
saves board space, reduces cost, and improves layout flexibility.
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT A
–IN A
+IN A
V+
OUT D
–IN D
+IN D
V–
ADA4004-4
TOP VIEW
(Not to Scale)
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
8
Figure 4. 14-Lead SOIC
(R-14)
Applications for these amplifiers include high precision controls,
PLL filters, high performance precision filters, medical and
analytical instrumentation, precision power supply controls,
ATE, and data acquisition systems. Operation is fully specified
from ±± V to ±1± V from −40°C to +12±°C.
16 15 14 13
1
2
3
4
12
11
10
9
–IN A
+IN A
V+
–IN D
+IN D
V–
The ADA4004-1, ADA4004-2, and ADA4004-4 are members
of a growing series of low noise op amps offered by Analog
Devices, Inc. (see Table 1).
ADA4004-4
TOP VIEW
(Not to Scale)
+IN B
+IN C
Table 1. Voltage Noise
5
6
7
8
Pkg.
0.9 nV 1.1 nV
1.8 nV
2.8 nV
3.8 nV
Single AD797 AD8597 ADA4004-1 AD8675 AD8671
Dual
AD8599 ADA4004-2 AD8676 AD8672
ADA4004-4 AD8674
NOTES
1. NC = NO CONNECT.
2. IT IS RECOMMENDED THAT THE EXPOSED PAD
BE CONNECTED TO V–.
Quad
Figure 5. 16-Lead LFCSP
(CP-16-4)
Rev. E
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